Mechanism to prevent the stripping of transmission-gears.



H. M. THORBSON.

MEOHAN'ISM TD' PREVENT THE STRIPPING 0F TRANSMISSION GEARS.

APPLIUATION FILED AUG.10, 1912.

I HMTh/oresmg Willa memo a I invention consists of the novel details ofconstruction, combination, formation and arrangement of parts as will behereinafter UNITED STATES PATENT OFFICE.

HARRY M. THOBESON, 0F YA NKTON COUNTY, NEAR IRENE, SOUTH DAKOTA.

MECHANISM TO PREVENT THE STB'I'PPING 0! TRANSMISSION-GEARS.

Specification of Letters Patent.

Patented Dec. 9,1913.

Application ma August 10, 1912. Serial No. 714,457.

To all whom it may concern: a

Be it known that I, HARRY M. Tnonneon, a citizen of the United States,residing in the county of Yankton, county of Clay and State of SouthDakota, have invented certain new and useful Improvements in Mechanismto Prevent the Stripping of Transmission-Gears, of which the followingis a specification, reference being had to the accompanying drawings.This invention relates to improvements in mechanism to prevent. thestripping of transmission gears of automobiles and the primary object ofthe present invention is to provide means whereby the transmission shaftmay be tervals so that the transmission gears may changed to prevent thestripping thereof and w ich will also eliminate the cutting and grlndingsound from the transmission gears, as is true with the same which arenow in use.

A further object of the present invention is to connect the transmissionshaft with the main driving shaft and the crank shaft of. an engine withfrictional clutches which may be operated jointly or severally, so thatthe transmission gears may be changed to prevent the stripping thereof.

With these and other objects in view, this more fully described andparticularly pointed. out in the accompanying drawings.

in the accompanying drawings has been illustrated a simple and preferredform of the nvention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,

but'that the right is reserved to any changes,

alterations, and modifications to which recourse may be had withinthescope of the invention and without departlng from the spirit orsacrificing the eiliciency of the same.

In the said drawings, Figure 1 is a detail section through the frame ofan automobile illustrating improvement as applied thereto, and Fig. 9.is a detail section taken on the line 22 of Fig. 1.

Reference now being had to the accompanying drawings wherein I havedesignated corresponding parts by like numerals throughout the severalviews, the numeral 1 indicates a portion of an ordinary automobile framehaving mounted therein the usual near Irene, in the stopped fromrotating at in gasolene engine 2, which has keyed to the crank shaftthereof a fly wheel 3. A casing 4 is mounted upon the framework of theautomobile in the usual manner, and has mounted therein the usualsliding transmission gearing which is adapted to be operativelyconnected with the transmission shaft 5 in the usual manner. The forwardend of this transmission shaft 5 has mounted thercon one member of anordinary cone clutch 6, and its opposite end has slidably mountedthereon a similar spring actuated member 7 of a cone clutch.

The main driving shaft, indicated by the numeral 8, is journaled Withina bearing 9 depending by means of a bracket 10 upon the framework of theautomobile. This shaft has keyed thereto a fly wheel 11 which is adaptedto contact with the clutch member 7 of the transmission shaft.

A shaft 12'is journaled within the frame work of the automobile and hasloosely mounted thereon a pair of parallel extending foot levers 13 and14, respectively. The

foot lever 14 has depending therefrom a curved arm 15, which is forkedat its lower extremity and connected to the sleeve of the clutch member6 in the usual manner where by the clutch member on the transmissionshaft may be thrown in and out of gear with the crank shaft of theengine. The opposite footlever 13 has extending from the journaledsleeve thereof :1 lug 16 which is connected by a cable, chain or anyother flexible member 17 to a lever 18. This lever 18 is pivotallymounted to the framework of the automobile at one end, as at 19, whereasits opposite end is forked and connected to the sleeve of the clutchmember 7, whereby 0perating said lever said clutch member will be thrownin and out of gear with the fly wheel 11 of the main driving shaft. Thiscable 17 is connected adjacent the medial portion of the lever 18 andextends over an idle pulley 20 supported upon the upper face of thetransmission gear casing and its opposite end is connected to the lugextension 16.

It is obvious from the foregoing description, taken in connection withthe accompanying drawing, that the foot pedals 13 and 14 may be operatedtogether, thereby throwing the clutch members 6 and 7 out of gear, whichwill obviously stop the rotation of the transmission shaft 5. When thistransmission shaft 5 has been stopped, the transmission gear may beeasily and readily lol Having thus described the inventiomwhatis claimedis 1. In a device of the character described, a transmission shaft,means for detachably connecting said transmission shaft with the theframe of a vehicle,

crank shaft of an engine, meansfor detachably connecting saidtransmission shaft to the drive shaft of a vehicle, a pair of levers,means for connecting said levers with said detachable means, and footpedals mounted on said levers, said pedals being arranged closelyadjacent each other, whereby the pedals may be operated singly or bothpedals may be operated by one foot of the operator, as and for thepurpose described.

2. The combination with a vehicle frame, of a transmissionshaftjournaled thereupon, a clutch connecting one end of said transmissionshaft with the crank shaft ofan engine, a clutch connecting the oppositeend of said transmission shaft with the drive shaft of a vehicle, ashaft .journaled within a pair of parallel extending foot levers mountedupon'the last.

mentioned shaft, a link extending from one lever for operating the firstmentioned clutch, a flexible member extending from the other may beoperated independently or simultaneously, as and 3. The combination withan automobile frame, of a transmission shaft jonrnaledthereupon, aclutch connecting one end of said transmission shaft with the crankshaft site end of the transmission shaft with a drive shaft, a shaftjournaled within theframe of the automobile, a pair of foot leversmounted upon said second shaft, a link extending from one lever foroperating the first mentioned clutch, and a flexible member extendingfrom the other lever for operating the last mentioned clutch, footpedals arranged on said levers, said pedals being arranged closelyadjacent each other,

whereby the pedals may be operated singly or both pedals may of theoperator.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

HARRY M. THORE SON.

Witnesses:

H. S. MATTHEWS, JAMES I. WELO.

for the purpose described.

be operated by one foot lever for operating the last menv tioned clutch,and means whereby said levers of an engine, a clutch connecting theoppo-

